Surfacing machine



`July 7, 1959 l Filed DSO. 19. 1957 J. P. BRUCK SURFACING MACHINE 2 Sheets-Sheet 1 mn' @www a /Z I Y LA' Q /3 7 I y INVENTOR.

doh/7 P. Bruck July 7, 1959 J. P. BRucK SURFACINGv MACHINE 2 Sheets-Sheet 2 Filed Dec. 19, 1957 Lme o Line of Yoke Mohan FRONT Lune of Yoke' Mohan j f Yoke n Maha Fmi.

me of Pad Mor/on.

INVENTOR. John Brac/r BY PM TTORNEVS United 2,893,115 sURFAciNG MAcmNn John P. Bruck, Toledo, Ohio, assignorto American- Lnglln Corporation, Toledo,I Ohio, a corporation o 1o This invention "relates to surfacing machines, and particularly to those of the power` driven hand operated type, and its primary object is the provision in such a machine of improvedmeans lfor translating a rotary movement of a -part of the power means into a reciprocatory movement of the surfacingy pad.

A further object of the invention is the provision of such a translating means .that is adjustable to vary or angularly shift the line of,freciprocatory'movement of the surfacing pad to suit use bya nght or a left hand person or to obtain the operation desired. f

A further object of the invention is Vthe provision of means for causing said movement translatingmeans, to impart an orbital instead of a .reciprocatoryxmovement to the pad. p t i Furtherobjeets and advantages .of thefinvention will be apparent from the following detailed description, and from the accompanyingdrawings illustrating one embodiment thereof, and in -which Fig. 1 is a central vertical section fof the machine, with partsinfull; v i v Fig. 2 is a section on the line 2-2 in Fig. 1, `with the pad driving connection yset for orbitalr movement of the pad; j

Fig. 3 is a plan view of amachineset for diagonal movement of the pad as held by a right handed operator; i

2,893,175 Patented` July '2, 1.959

screw 12 is an upwardly facing channel plate 13 forming a guide for the reciprocatory movements of a yoke block 14. The motor shaft 15 extends down into the body casing through its top and has suitable driving connection with a member 16 mounted for rotary movements on a vertical stub shaft 17 Xedly projecting down into the casing from its top approximately at its center.

The member 16 has at its lower end a stub shaft 18 that is eccentric to the axis of rotation of the member and connects with the block 14 through a bearing 19 therein whereby orbital movements of the stub shaft 18 impart reciprocatory movements to the block 14 in the guide channel 13. If the channel plate 13 is set, so that the relative reciprocatory movement of the block is crosswise of the platen 6, as shown in Fig. 2, then the consequent reciprocatory movement imparted to the channel and pad by rotation of the eccentric 18 is along the longitudinal center line a-a (Fig. 2) of the pad. This reciprocatory movement of the pad may be shifted to a diagonal line b-b at the right (Fig. 3) or to a diagonal line c-.c at the left of the longitudinal center line a-a (Figs. 4' and 5). It is found in practice that this shifting ofy the pad movement is important as it not only facilitates and enhances the abrading action of the machine by combining a broad side with a longitudinal movement of the pad, but also renders the machine dependable for convenient holding by either a right or a left handed person. For right hand operation, the operator preferably. adjusts the channel plate '13 to substantially thenposition shown in Fig; 3, so that the movement of 'thepad is generallly along a diagonal line b-b and he preferably grasps the handle 4 with his right hand and a knob 20 on the front end of the motor housing 2 With his left hand.

For left hand operation, the operator adjusts the channel 13 to substantially the position shown in Fig. 4, so

Fig. 4 is a plan view of the machine set for diagonal i Referring to the drawings, 1v*'designates the-body cas'- .y

ing or frame of the machine which,"in 4the present instance, is of inverted panshapeand has,..on .its front end portion a motor housing lZvfor electric operating motor 3. housing has? a handle-A4'1pr'ojecting rearwardly therefrom over its rear end, and the customary motor lead wires extend therethrc'nlgh. The motrfcontrol switch trigger 5 is located at the inner end of the handle, as is customary in machines of this type.

The body casing 1 is supported above and united to a surfacing pad or platen 6 by a plurality of posts 7 of rubber or other suitable material, preferably of a resilient nature. The pad 6 is preferably of dat, stiff sheet-like material faced at its under side with a padlike part 8 and over this is drawn a strip of sandpaper 9 or other suitable surfacing material. The ends of this material, in the present instance, are doubled over the respective ends of the pad 6 and clamped thereto by a bar 10 which, in turn, is held by a clamping nger 11 secured to the platen. Mounted on the top of the pad 6 and held substantially centrally thereon for rotary adjustment by a center that the-movement of the pad 6 is generally along the diagonal line 'c-c, and preferably grasps the handle 4 with his left hand and the knob V20 With his right hand. The bottom of the channel 13 is provided with an arcuate slot 21 and a clamping screw 22 is projected through the slot and into the pad 6 to secure the channel in adjusted position.

It is found in practice that with the block 13 properly lubricated in its channel and the travel or stroke of the block approximatelyg of an inch, there is a variance, due probably to frictional action, of approximately l0"l between the general line of movement of theblock 13 in Yits guide channel 14 and the line of movement of the pad or platen 6. This variance is indicated,'respectively', in Figs. 4 and-5 by the lines b-b and c-crepresent'- ing' the block movement and the lines d-d the pad or platen movement. l Y j When r4a gyratory or orbital movement of the pad' is desired, the channel 13 is secured in adjusted position to the pad 6 by a'tightening of the screw 22, and a screw 24 is insertedthrougha hole 25 in the block14 and engaged into a hole26 in the channel, thus rigidly con necting the platen channel 13 and block 14 as a unit.

In operation, a right handed operator usually grasps the handle 4 in his right hand and the knob 20 in his left hand with the reciprocatory line of movement of the machine pad 6 diagonal thereto or substantially along the line d--d in Fig. 3 while the line of reciprocation of the yoke block 14 is substantially along the line b-b. To adapt the machine for use by a left handed operator, the channel 13 and yoke block 14 are shifted to the position shown in Fig. 4 so that the pad and yoke block movements are substantially along the lines c-c and d-d, respectively, in Fig. 4. For a straight longitudinal reciprocatory movement of the platen or pad 6, the channel 13 is set crosswise thereof as shown in Fig. 2l

to any specih'c construction, arrangement or form of' the parts, as it is capable of numerous modifications and,

changes without departing from the spirit of the claims.

I claim: l

1. In a machine of the class described having a body, a pad supporting the body for relative vibratory movements, and a power mechanism carried by the body and having an orbitally movable member adjacent to the pad, the provision on the pad of a channel part, means attaching said part for rotational adjustment on the pad, a; yoke block guided for reciprocatory movement in the channel and engaged by said member to cause orbital movements of the member to impart vibrator'y movements to the pad relative to said body.

2. In a machine of the class described having a body, a pad supporting the body for relative vibratory movement, and a power mechanism carried by the body and having an orbitally movable member adjacent to the pad, the provision of a channel element mounted for rotational adjustment on the pad in the plane of `the pad, meansfor holding said element in adjusted position on the pad, a yoke block guided for reciprocatory movement by said element, said member' having `a bearing in said element whereby orbital movement of the member imparts straight-line movements to the pad lengthwise or diagonal thereto depending on the position of adjustment of the channel.

3. In a machine of the class described having a body, a pad supporting the body for relative vibratory movement, and a power mechanism carried by the body and having an orbitally movable member adjacent to the pad, the provision of a channel element mounted for rotational adjustment on the pad in the plane thereof, means for holding said element in adjusted position on the pad, a yoke block guided for reciprocatory movement by said element, said member having a bearing in said element whereby orbital movement of the member imparts straight-line movements to the pad lengthwise or diagonal thereto depending on the position of adjustment of the channel, and means for securing saidl yoke block in fixed relation to the channel.

4. In a machine of the class described having a body, a pad supporting the body for relative vibratory movement, and a power mechanism carried by the body and having an orbitally movable member adjacent to the pad, therprovision of a channel element mounted for rotational adjustment on the pad in the plane thereof,

means for securing said element in various adjusted relations to the pad whereby its channel may be crosswise or in right or left diagonal relation to the platen, and a yoke block mounted in vand guided for reciprocatory movements in the channel, said block having a bearing for said orbitally movable member wherebycorresponding movements` are imparted thereby to said block. I

5. In a machine of the class described having a body, a pad supporting the body for relative vibratory move; ment, and a power mechanism carried by the body and having an orbitally movable member adjacent to the pad, the provision ofa channel element mounted for rota'- tional adjustment on the pad in the plane of the pad, means for securing said element in various adjusted relations to the pad whereby its channel may be crosswise or in right or left diagonal relation to the pad, and a yoke block mounted in and guided for reciprocatory movements in the channel, said block having a bearing for said orbitally movable member whereby corresponding movements are imparted thereby to said block, and releasable means for preventing relative movements of the channel element and yoke block.

6. In a surfacing machine having a body, a pad supporting the body 'by' a plurality of resilient posts for relative vibratory movement, a power mechanism carried by the body and having an orbital movement member driven by the power mechanism adjacent the pad, the pad having a channel plate mounted o n the top thereof in which is mounted the orbitalY movement member, means for rotatable adjustment of the channel plate on the pad.

7. In a surfacing machine having a body, a pad supporting the body by a plurality of resilient posts for relativevibratory movement a power mechanism carried by the body, lsaid power eehanism having an orbital movement member adiclit the pad, a channel plate mounted o n the pad for rotatable adjustment in a plane of the pad, the orbital movementrnember being positioned in the channel plate on the pad, with means for securing said channel plate' in 'various adjusted relation to the Pad- 8; In a' surfacing machine having a body, a pad supporting the body by a plurality of resilient posts, a power mechanism carried by the body terminating in a member having a stub shaft which is eccentric to the axis of rotation ofthe member, a block mounted on the top of the pad in which projects the eccentric stub shaft, the block being pivotally rotatable on the top ofthe pad with means for securing said block in various adjusted relation te the pad. Y

9. The structure according to claim 6 in which surfacing material is attached to the pad.

10, In a surfacing machine' having a body, a pad supporting the body by a plurality of resilient posts, a power mechanism carried vby the body terminating in a member having a still? shafty which is eccentric to the axis of rotation ofthe member, a channel plate mounted on the top Vof the pad, a yokeV block mounted therein, the stub shaft projecting'uilnto the yoke block, said channel plate having in its middle a loose connection to the pad and an arcuatesl'ot thereinrer'r'lQVcd from said loose connection, a threaded y er projecting through the arcuate slot into the pad vv' rby on tightening the threaded member ,the Position of the channel plate can be ixedly varied in ,relation te .the pad;

References ited in the le of this patent UNITED STATES PATENTSy 

